Grate-bar



L. c. PERKINS AND. R. F. McKINNEY.

GRATE BAR. APPLICATION FILED APR. 26, 1020.

Patented Aug. 30, 1921.

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V UNITED STATES.

PATENT OFFICE.

LESTER, o. PERKINS AND ROBERT F. MCKINNEY; or MECHANICSVILLE, NEW YORK.

GRATE-BARA To all whom it may concern.

Be it known that we, Tins'rnn C. PERKINS and Romm'r F. MoKINNEY, citizens of the United States, residing at Mechanicsville, in the county of Saratoga andState of New York, have invented certain" new and useful Improvements in Grate-Bars, of which the following is a specification.

This invention relates to grate bars, and it comprises a body portion having a number of transverse grooves arranged therein to form a corrugated surface, openings arranged in the body portion and a plurality of flat plates secured to the top of the body portion and arranged over said openings.

The present invention relates to the production of a grate that is particularly applicable for use with fine fuels not suitable for burning in an ordinary grate. At the present time, such fuels are thrown away due to the lack of suitable grates for burning them. In the present invention, we have produced a grate construction which pr0- vides a substantially solid support on which fine fuel may be readily supported and in which the air is delivered to the bottom of the fuel bed laterally, so that sufficient air is supplied for all portions of the fuel and complete combustion ensues.

In the accompanying drawings, we have shown one embodiment of this invention. In this showing,

Figure 1 is a plan view of the grate bar,

one of the plates being shown broken away.

Fig. 2 is a vertical longitudinal sectional view of the grate bar taken through the center of one of the plates, and

Fig. 3 is a detail view of the plate or strip arranged on the grate.

Referring to the drawings, the reference numeral 1 designates the top of the grate bar. A plurality of transverse grooves 2 are arranged in the upper surface forming ribs or projections 3 and producing the effect of a corrugated surface. The body portion of the grate is provided with a number of openings 4 extending through the top of the grate bar and forming air passages. These openings are arranged in longitudinal alinement, any number of sets of openings being provided. As shown, there are two sets of openings arranged in a single grate bar. Flat plates 6 are arranged on the top of the grate bar covering the openings 4. The pro- -jecting ribs on the surface of the grate bar maintain the plates 6 of a distance above the specification of Letters Patent. Patented Aug, 30,1921 Application 'file(1 April 26,1920. Serial. No. 376,696.

base of the grooves (see Fig. 2), and thus permit "free circulation of air laterally with respect to the bed of fuel when the grate is in use. The plates 6 are secured to the grate in any suitable manner, and in'this disclosure,

we have shown bolts 7 entering openings 8 in the grate bar. The grate bar is provided with the usual downwardly projecting flanges 9 having recesses lOfor the reception of. grate supporting means and the ends of the grate bar may be inclined as at 11 and 12 to permit its assemblage.

From the above description, it will be seen that we'have provided a grate construction which gives a substantially solid support for the fuel bed and in which very fine fuel may be used without the possibility of the fuel falling through the air openings formed in the grate. The arrangement of the plates covering the air openings, in combination with the transverse grooves in the top of the grate bars furnishes a very effective arrangement for feeding air to all portions of the bed of fuel. The air coming up through the openings 4 is discharged laterally into the transverse grooves 2, and is thus delivered to the bed of fuel in even proportions throughout the entire bed. The ribs 3 are preferably cut away as at 13 in alinement with the openings 4:, whereby the air is distributed to the grooves that are not in alinement with the openings 4.

Although we have shown and described a preferred embodiment of the invention, it is to be understood that various changes may be madein the detail construction and arrangement of parts without departing from the spirit of the invention or the scope of the subjoined claims.

What we claim is:

1. A grate comprising a body portion having its upper face corrugated throughout the greater portion of its area, said body portion being provided with alined air openings, and a relatively long flatbaffle plate arranged on the body portion and covering said air openings.

2. A grate comprising a body portion having its upper face corrugated throughout thev greater portion of its area, said body portion being provided with alined air openings, and a relativelylong fiat baffle plate arranged on the body portion and covering said air openings, said baffle plate being of greater width than said openings.

3. A grate comprising a body portion having its upper face corrugated to form ribs throughout the greater portion of its area, said body portion being provided with longitudinal alined air openings, the ribs of said corrugations terminating inwardly in longitudinally alined ends on opposite sides of said openings and in alinelnent with the outer sides thereof, and a relatively long flat baffle plate arranged on the body portion and covering said openings.

4. A grate comprising a body portion having its upper face corrugated to form ribs throughout the greater portion of its area, said body portion being provided with longitudinally alined air openings, the ribs of said corrugations terminating inwardly in longitudinally alined ends on opposite sides of said openings and in alinement with the outer sides thereof, and a relatively long flat baflle plate arranged on the upper portion of said corrugations and covering said openings, said bafiie plate being of greater width than said openings.

In testimony whereof we affix our signatures in presence of two witnesses.

LESTER C. PERKINS. ROBERT F. MCKINNEY. Witnesses:

ELIZABETH MURPHY, JOHN G. ROGERS. 

